88392

Appears in sequences

• Numbers k such that k*3^k - 1 is prime.at n=17A006553
• Numbers k such that phi(k) and sigma(k) are both perfect squares.at n=25A067781
• Let M_n be the n X n matrix M_(i,j) = 2^i-2^j then the characteristic polynomial of M_n = x^n-a(n)*x^(n-2).at n=6A077122
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+127)^2 = y^2.at n=12A129992
• Number of nondecreasing arrangements of 5 numbers in -(n+3)..(n+3) with sum zero and not more than two numbers equal.at n=27A188238